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2024 INTRO TO BIOLOGY STRAIGHTERLINE EXAM WITH CORRECT ANSWERS
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2024 INTRO TO BIOLOGY STRAIGHTERLINE EXAM WITH CORRECT ANSWERS
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2024 INTRO TO BIOLOGYSTRAIGHTERLINE EXAM WITH
CORRECT ANSWERS
Which of the following drugs ins a powerful CNS stimulant?
a) methamphetamine
b) heroin
c) marijuana
d) alcohol
e) All of the answer choices are powerful CNS stimulants. - CORRECT
ANSWERS-a) methamphetamine
Organs are composed of tissues, which are composed of cells. This is an
example of which characteristic of life? - CORRECT ANSWERS-Living things
have levels of hierarchical organization.
Nutrient molecules are used to build cellular structures or for energy. This
best represents which characteristic of life? - CORRECT ANSWERS-Living
things acquire materials and energy from the environment.
How does natural selection affect phenotypes? - CORRECT ANSWERS-It can
create an advantage, disadvantage, or remain entirely neutral.
You perform a genetic analysis of 73 school children. Your results indicate
that 13 are homozygous dominant for brown hair (BB), 35 are homozygous
recessive for blonde hair (bb), and 25 are heterozygous for brown hair (Bb).
What is the gene frequency of the dominant allele? - CORRECT ANSWERS-
35%
You perform a genetic analysis of 73 school children. Your results indicate
that 13 are homozygous dominant for brown hair (BB), 35 are homozygous
recessive for blonde hair (bb), and 25 are heterozygous for brown hair (Bb).
Is the dominant or recessive gene more prevalent? - CORRECT ANSWERS-The
recessive allele is more prevalent.
The summing up of excitatory and inhibitory signals in a neuron is called -
CORRECT ANSWERS-synaptic integration.
,Which part of the brain contains centers for the heartbeat and respiration? -
CORRECT ANSWERS-medulla oblongata
When individuals experience fear and pleasure, what part of the brain has
been stimulated? - CORRECT ANSWERS-limbic system
Saltatory conduction occurs when - CORRECT ANSWERS-the action potential
jumps from node to node.
Which part of a simple reflex takes the message away from the CNS? -
CORRECT ANSWERS-motor neuron
The sodium-potassium pump is primarily responsible for the - CORRECT
ANSWERS-resting potential.
Heroin binds to receptors on neurons that travel from the spinal cord to the
region of the brain that feels pleasure. These receptors are normally meant
for - CORRECT ANSWERS-endorphins.
The enzyme that breaks down acetylcholine within the synaptic cleft is -
CORRECT ANSWERS-acetylcholinesterase.
Carpal tunnel syndrome results in damage to the median nerve, resulting in
lack of control to the wrist and also numbness. This indicates that - CORRECT
ANSWERS-the nerve contained both sensory and motor neurons.
Dendrites do what? - CORRECT ANSWERS-carry impulses toward a cell body
Which type of cells are found only in the central nervous system? - CORRECT
ANSWERS-interneurons
The smallest unit that has all of the characteristics of life is the - CORRECT
ANSWERS-cell.
The blueprints for structural organization and metabolism are contained
in____, and the offspring receive copies of these instructions___. - CORRECT
ANSWERS-DNA; from the parent
If a new anti-cancer drug is found to be effective in initial tests with mice,
what might researchers conclude? - CORRECT ANSWERS-The drug is
effective in the mouse model; it must still be tested in humans.
True or false? Science technology is a basis for all ethical or moral decisions.
- CORRECT ANSWERS-False
,True or false? Science technology has brought about life-improving
discoveries, such as antibiotics. - CORRECT ANSWERS-True
True or false? Science technology helps us to understand the causes of
cancer. - CORRECT ANSWERS-True
True or false? Science technology may ease the feeding of the world
population by producing new plant strains. - CORRECT ANSWERS-True
True or false? Scientific experimentation may make use of a model instead of
an actual subject. - CORRECT ANSWERS-True
Technology is the______. - CORRECT ANSWERS-application of scientific
knowledge for a practical purpose.
Which of the following is a potential consequence if people stop using
technology in the agriculture industry?
a) There could be a significant decrease in the amount of food produced.
b) There would be a collapse of many of the terrestrial ecosystems on Earth.
c) The extinction of the top level species that reside in the communities
around the agricultural land.
d) The amount of food produced would increase.
e) None of these consequences will occur if people stop using technology in
the agriculture industry. - CORRECT ANSWERS-a) There could be significant
decrease in the amount of food produced.
Corn belongs to the kingdom... - CORRECT ANSWERS-Plantae
You have discovered a previously unknown organism. It is multicellular, with
a filamentous form, and absorbs food from its environment. Upon
microscopic examination, you see that the cells have nuclei. How would you
classify this organism? - CORRECT ANSWERS-kingdom Fungi
Which domain contains organisms that are adapted to life in harsh
environments? - CORRECT ANSWERS-domain Archaea
Which of the following is one of the domains of life?
a) Animalia
b) Eukarya
c) Molds
d) Protista
e) Fungi - CORRECT ANSWERS-b) Eukarya
Which classification category contains the closest related group of
organisms? - CORRECT ANSWERS-genus
, low hemoglobin levels despite high elevation in Tibetan populations over
generations is an example of ______ - CORRECT ANSWERS-natural selection
at work in humans
Which level of biological organization is composed of several tissues? -
CORRECT ANSWERS-organ
A physician specializes in surgery involving the following group of organs:
mouth, esophagus, stomach, and intestines. Overall, what is the highest
level of organization that this physician is specialized in? - CORRECT
ANSWERS-organ system
When comparing energy and chemicals in an ecosystem how many times do
chemicals and energy flow through? - CORRECT ANSWERS-chemicals cycle
over and over again, but energy flows through once
All the organisms of various species living within a given area constitute a -
CORRECT ANSWERS-community.
True or false? Chemicals are recycled in an ecosystem. - CORRECT
ANSWERS-True
True or false? Energy flows through an ecosystem, with some being lost as
heat. - CORRECT ANSWERS-True
True or false? Some organisms produce food used by themselves and others.
- CORRECT ANSWERS-True
True or false? There is a community of organisms, but no non-living
components. - CORRECT ANSWERS-False
True or false? Climate is the main factor that determines where an
ecosystem will be located. - CORRECT ANSWERS-True
The most important factor that determines where major ecosystems are
located on the globe is - CORRECT ANSWERS-climate.
An ecosystem generally requires solar energy, nutrients, decomposers,
consumers, and _____. - CORRECT ANSWERS-producers.
biodiversity is adversely affected as humans have destructive effects on
ecosystems as - CORRECT ANSWERS-the human population size increases
The term "biodiversity" refers to - CORRECT ANSWERS-the total number of
species, variation of species and the ecosystems in which they live.
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